Re: [PATCH] x86/sev: Add AMD_SEV_ES_GUEST Kconfig for including SEV-ES support

[Paolo Bonzini]

On 18/01/21 21:29, Borislav Petkov wrote:
> On Fri, Jan 15, 2021 at 04:25:17PM -0800, Sean Christopherson wrote:
> > Introduce a new Kconfig, AMD_SEV_ES_GUEST, to control the inclusion of
> > support for running as an SEV-ES guest.  Pivoting on AMD_MEM_ENCRYPT for
> > guest SEV-ES support is undesirable for host-only kernel builds as
> > AMD_MEM_ENCRYPT is also required to enable KVM/host support for SEV and
> > SEV-ES.
>
> Huh, what?
>
> I'm not sure I understand what you're trying to say here and am not
> convinced why yet another Kconfig symbol is needed?

I think it makes sense because AMD_SEV_ES_GUEST's #VC handling is quite 
a bit of code that you may not want or need.  The commit message does 
need a rewrite though.

Paolo